ARM: dts: msm: Add lpm workaround and cpu sleep status for msm8909

Add cpu sleep status and lpm workaround nodes for msm8909-PM660.

With lpm workaround L2 SPM Programming in skipped in HLOS as
there is a race when both HLOS and TZ programming the L2 SPM.

Sleep status device is used to check the power collapsed status
of a offlined core.

Change-Id: Iab6a8ba2d16841dbeafc6a0fc66d63285e97176b
Signed-off-by: Maulik Shah <mkshah@codeaurora.org>